Oil-burner.



R. D. MAINS.

COLUMBIA PLANOGRAPH co., wAsMxNGroN. p. c,

ROBERT D. MAINS, 0F COUNCIL BLUFFS, IOWA.

OIL-BURNER.

Specification of Letters Patent.

Patented Nov. 14, 1911.

Application led October 12, 1910. Serial No. 586,672.

To all whom t may concern:

Be it known that I, ROBERT D. MAINS, a citizen of the United States, residing at Council Bluffs, in the county of Pottawattamie and State of Iowa, have invented certain new and useful Improvements in Oil- Burners, of which the following is a specication.

This invention relates to improvements in oil burners, particularly useful in connection with fire boxes of steam boilers, but may be used in other furnaces to advantage.

One of t-he objects of the invention'is to provide means for producing a fuel which will consist of a mixture of oil and heated steam, the same to be delivered, under pressure, within the furnace or fire box, the oil being atomized.

Another object is to provide means for elevating the oil to any desired altitude from a container, and when atomized, to convey it, intermixed with steam, to the fire box; also to effect combustion of oil as a fuel, without producing any appreciable quantity of smoke.

The invention includes the provision of an oil chamber having a supply pipe through which oil is made to pass upwardly within the chalnber by suction, the force therefor being steam under pressure, the steam discharge-pipe having an exit port 4adjacent to a reduced discharge port of the oil chamber, the movement of t-he steam through its exit port causing the oil to be atomized at the nozzle or terminal of the steam dischargepipe while the oil moves in an annular passage way, and at which point it becomes mixed with the steam and is thereafter conveyed to the fire box or furnace. v

The invention also has reference to certain other parts found to be useful, consisting of anelongated duct or pipe-section disposed at the exit port'of and having a less diameter or bore than the oil chamber, and the employment of a reservoir or expansionchamber for the oil-charged steam, said reservoir communicating with the fuel discharge pipe and with the duct of the oil chamber.

By use of the herein described invention, an atomized fuel may be provided, and the same force which atomizes the oil,.elevates it. The oil supply-tank may therefore be located at a lower altitude than the point where the fuel is discharged in the furnace or fire-box.

With the objects in view as above expressed, the invention consists of the novel combination and arrangement of parts as described herein and claimed, and as illustrated in the drawing, whereim- Figure 1 is a vertical side view of an oil burner embodying my invention, parts being in section to clearly show construction. Fig. 2 is an enlarged detail, inlongitudinal section, showing the oil chamber and connecting parts. Fig. 3 is a transverse, sectional view on line a-a of Fig. 2.

Referring now to the drawing for a more particular description, numeral 4 indicates a furnace, and 5 the fire box thereof, a part of a steam boiler being shown at 6.

At 7 within the fire box, is indicated the discharge-terminal of the fuel dischargepipe 8, and it will be understood that oil mixed with steam may pass through pipe 8, and may be discharged within the fire box, by force of steam, from steam discharge-pipe 9. At l0 is indicated anoil tank having an upright pipe 11 connecting with oil chamber 12, said pipe having a valve 18.V Chamber 12 is formed by employing the cylindrical receptacle 14, said receptacle having a part of its bore reduced to provide an annular, tapered, inner discharge-terminal 15; and pipe 9, preferably, passes through the end or bot-tom 16 of receptacle 14 and may have a threaded connection therewith; pipe 9 is disposed centrally of the receptacle, its discharge port 17 being disposed adjacent to the tapered part 15 of said receptacle.

At 18 is indicated a pipe-section or duct having a bore substantially the same as that of the discharge terminal 15 of receptacle 14, its discharge terminal being indicated at 19, and it is mounted upon the inner terminal of and, preferably, extends parallel with receptacle 14, and in effect, its bore operates as a continuation of chamber 12.

I provide the cylindrical container 20, the same forming an air-tight inclosing wall bej tween and having its ends mounted respectively upon receptacle 14 and fuel dischargepipe 8, said container providing Aan expansion-chamber or fuel-reservoir 21. It has a bore greater than the bore of pipe 8 or pipesect-ion 18, and the discharge port 19 of pipesection 18 is located a suitable distance from the intake 22 of pipe 8, this discharge port being substantially midway between the ends of container 20. Intake 22 may be considered as the discharge port of container 20.

In operation, steam under control of valve 23, from any suitable source of supply, may

pass through pipe 9 within chamber 12, and moving in a course o'f least resistance, it will pass through pipe section 18, chamber 21, pipe 8, and will enter the furnace or fire box by passing through discharge port 7 However, since the tapered inner wall of receptacle 14 is disposed near the inner end of pipe 9 and at this point provides an annular passageway 24 of less area than t-he bore of pipe-section 18, and since the transverse area of oil chamber 12-is greater than that of passageway 24, the force of the steam, during its movement through `passageway 24, will cause the oil to be elevated from tank 10. The oil will, thereupon, pass within chamber 12 from the oil tank and will be drawn through passageway 21, and will be atomized or divided into small particles at this point. It -will be thoroughly mixed withthe steam and will be heated thereby and will move into the furnace therewith, where it will burn readily and to advantage. Also practically no smoke will be created by the combustion.

In practice, the fire box is substantially filled with burning gas, the entire supply of fuel being the heated and atomized oil which passes therein through pipe 8. The provision of chamber 21 operates as a t cushion to regulate the iiow of fuel from discharge port 7, since the steam is not always regular in its pressure.

Itwill be noted that the bore of pipe 9 is considerably less than that of the other pipes. 'Howeveig it is sufficiently great to provide all ofthe force required for elevating, heating and atomizing the oil. Y If the discharge port 7 was provided with a small bore, the fuel would pass into the furnace with too great a force to burn to advantage.

Pipe 8 is of uniform bore its entire lengt-h, and since its bore is greater than the bore of pipe-section 18 as clearly shown in Fig. 2, the fuel passes into the fire box from pipe 8 with a degree of force advantageous to combustion, member 21 providing an expansion-chamber for the fuel which pre vents fluctuations in the fuel discharge.

One function of pipe-section 18 is to aid atomization of the oil. It is quite necessary to provide aduct communicating with passageway 24, so that t-he force of the steam will be directed forwardly of said passage way. Also it has been ascertained, in practice, that if'the pipe-section is omitted, oil cannot be readily elevated within pipe 11.

V'Having fully mentioned the several parts andtheir uses, a further description relating to operation is not necessary.

What I claim as new and desire to secure byLetters Patent is,

1. An oil burner comprising a cylindrical receptacle having a fuel intake and formed with a contracted discharge port; a fuel discharge pipe; an elongated container having its respective ends mounted upon and forming an air-tight inclosing wall between the receptacle and the fuel discharge pipe; a pipe adapted to conduct steam extending within and circumscribed by the receptacle and having a discharge port disposed adjacent to the contracted discharge port of said receptacle; and a pipe-section mounted upon the receptacle and having a bore substantially equal to and in communication with the contracted discharge port thereof, said pipe-section having a discharge terminal disposed midway bet-Ween the ends of and circumscribed by said container. f j

2. An oil burner -comprising an elongated, cylindrical receptacle having a fuel intake pipe and an interiorly tapered terminal forming a discharge port; a steam pipe disposed longitudinally of and extending within said receptacle and having a discharge terminal disposed adjacent to said discharfre port and forming between the walls of said steam pipe and discharge port an annular passageway; a pipe section mounted upon said receptacle and havingl a bore substantially equal to the boreof the discharge port thereof; a fuel discharge pipe having a greater bore than the bore of the pipe section; and a container having a bore greater than the bore of the fuel discharge I Ji e said container circumscribin the i e s section and having its respective ends mounted upon and forming an air-tight wall between the fuel discharge pipe and said receptacle.

3. An oil burner comp-rising a cylindrical receptacle having a fuel intake pipe and a tapered, inner wall to form a discharge port; a pipeV adapted to contain ste-am traversing said receptacle and having a terminal disposed adjacent to the discharge port of said receptacle; a fuel discharge pipe having a greater bore than the discharge port of the receptacle; and a cylindrical container having an air-tight wall of a greater bore than the bore of the fuel discharge pipe to provide an expansion chamber, said container being disposed to circumscribe a part of and having one of its ends mounted upon the wall of said receptacle, its opposite end being mounted upon said fuel discharge pipe.

In testimony whereof I have affixed my signature in presence of two witnesses.

ROBERT D. MAINS.

Witnesses: l

HIRAM A. STURGES, A. F. CLARK.

Gopies of thispatcnt may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. C. f 

